CN106208008A - A kind of important load bus residual voltage keeps system - Google Patents
A kind of important load bus residual voltage keeps system Download PDFInfo
- Publication number
- CN106208008A CN106208008A CN201610754153.4A CN201610754153A CN106208008A CN 106208008 A CN106208008 A CN 106208008A CN 201610754153 A CN201610754153 A CN 201610754153A CN 106208008 A CN106208008 A CN 106208008A
- Authority
- CN
- China
- Prior art keywords
- speed
- sensitive switch
- bus
- rogowski coil
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Abstract
The invention discloses a kind of important load bus residual voltage and keep system, including degree of depth reactor, described degree of depth reactor includes measurement and control unit, Rogowski coil and controller, described Rogowski coil and controller are installed on bus, high-speed figure potentiometer it is provided with in described Rogowski coil, it is provided with speed-sensitive switch in described controller, the signal output part of described high-speed figure potentiometer is connected with the signal input part of described speed-sensitive switch, the voltage output end of described bus is connected with the voltage input end of described measurement and control unit, described bus is in parallel with important load near one end of Rogowski coil is followed by transformator, a terminating load near speed-sensitive switch.The present invention can dope the precise time of three-phase current zero crossing the most accurately, pass through speed-sensitive switch, can cut-off by accurate separating brake when electric current is close to zero point, the short circuit current change of current enters in deep current-limiting reactor, limiting short-circuit current, the present invention can meet residual voltage needed for important load when instantaneous interruptedly supplying power.
Description
[technical field]
The present invention relates to a kind of current-limiting apparatus, keep system particularly to a kind of important load bus residual voltage.
[background technology]
It is known that power system is short-circuited during fault, short circuit current is generally tens times of rated current, and this gives and becomes
The electrical equipments such as depressor, electromotor, chopper, conveying circuit cause the biggest harm, along with the development of all types of electricity consumption enterprises is strengthened
Greatly, power load is carried out on a large scale soaring, and main transformer capacity increases the most accordingly, each utility power grid systems face short circuit current already close to
With reach load vacuum circuit breaker maximum operating limit, load-side vacuum circuit breaker cut-offs off-capacity, transformator resistance to shorting
The problems such as the design of rush of current ability is not enough, serious threat enterprise security and is run, and in the face of present problem, a lot of enterprises adopt
Limit system short-circuit electric current with high-impedance transformer, but transformator increasing impedance the most finally solves current limliting depth problem, electronic
Power reduces little, also brings active reactive loss, and cost of investment rises, to this end, it is proposed that a kind of important load bus is residual
Pressure holding system.
[summary of the invention]
A kind of important load bus residual voltage of offer is provided and keeps system, due in Rogowski coil
High-speed figure potentiometer, can dope the precise time of three-phase current zero crossing the most accurately, and respectively at every phase current
Sending signal before zero passage, by speed-sensitive switch, can cut-off by accurate separating brake when electric current is close to zero point, the short circuit current change of current is entered
Entering in deep current-limiting reactor, limiting short-circuit current, amplitude of short circuit is substantially reduced, and can effectively solve asking in background technology
Topic.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of important load bus residual voltage keeps system, and including degree of depth reactor, described degree of depth reactor includes observing and controlling list
Unit, Rogowski coil and controller, described Rogowski coil and controller are installed on bus, are provided with at a high speed in described Rogowski coil
Digital regulation resistance, is provided with speed-sensitive switch, the signal output part of described high-speed figure potentiometer and described high speed in described controller
The signal input part of switch connects, and the voltage output end of described bus is connected with the voltage input end of described measurement and control unit, described
The signal output part of measurement and control unit is connected with the signal input part of described speed-sensitive switch and backstage, and described bus is near Rogowski coil
One end in parallel with important load be followed by transformator, near a terminating load of speed-sensitive switch.
Compared with prior art, there is advantages that due to the high-speed figure potentiometer in Rogowski coil,
The precise time of three-phase current zero crossing can be doped the most accurately, and before every phase current zero passage, send letter respectively
Number, by speed-sensitive switch, can cut-off by accurate separating brake when electric current is close to zero point, the short circuit current change of current enters deep current-limiting reactor
In, limiting short-circuit current, amplitude of short circuit is substantially reduced, and due to measurement and control unit, can automatically detect busbar voltage, work as voltage
Ging up and send signal to speed-sensitive switch immediately, system recovery is properly functioning, the alternative high-impedance transformer of native system, commonly connects
Current-limiting reactor, explosive type high-capacity and high-speed breaking device, when the design of new electricity supplying and using system and business system transformation, available
The present invention strengthens system impedance, makes the drop-out current of load side chopper reduce further, reduces cost, can be in instantaneous time cut-off
Residual voltage needed for important load is met during electricity.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the present invention.
In figure: 1, degree of depth reactor；2, Rogowski coil；3, speed-sensitive switch；4, bus；5, controller；6, measurement and control unit；7、
Transformator；8, load；9, important load.
[detailed description of the invention]
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with
Detailed description of the invention, is expanded on further the present invention.
As it is shown in figure 1, a kind of important load bus residual voltage keeps system, including degree of depth reactor 1, described degree of depth reactor
1 includes measurement and control unit 6, Rogowski coil 2 and controller 5, and described Rogowski coil 2 and controller 5 are installed on bus 4, described
It is provided with high-speed figure potentiometer in Rogowski coil 2, in described controller 5, is provided with speed-sensitive switch 3, described high-speed figure potentiometer
Signal output part is connected with the signal input part of described speed-sensitive switch 3, the voltage output end of described bus 4 and described measurement and control unit
The voltage input end of 6 connects, the signal output part of described measurement and control unit 6 and described speed-sensitive switch 3 and the signal input part on backstage
Connecting, described bus 4 is in parallel with important load 9 near one end of Rogowski coil 2 is followed by transformator 7, near the one of speed-sensitive switch 3
Terminating load 8.
Transformator zero of the present invention consumes degree of depth current limiting system, due to the high-speed figure potentiometer in Rogowski coil 2, and can be fast
Speed dopes the precise time of three-phase current zero crossing accurately, and sends signal before every phase current zero passage respectively, passes through
Speed-sensitive switch 3, can cut-off by accurate separating brake when electric current is close to zero point, and the short circuit current change of current enters in deep current-limiting reactor, limit
Short circuit current processed, amplitude of short circuit is substantially reduced, and due to measurement and control unit 6, can automatically detect bus 4 voltage, when voltage returns
Rising and send signal to speed-sensitive switch 3 immediately, system recovery is properly functioning, the alternative high-impedance transformer of the present invention, commonly connects
Current-limiting reactor, explosive type high-capacity and high-speed breaking device, when the design of new electricity supplying and using system and business system transformation, available
Present aspect strengthens system impedance, makes the drop-out current of load side chopper reduce further, reduces cost, can be in instantaneous time cut-off
Residual voltage needed for important load is met during electricity.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (1)
1. important load bus residual voltage keeps a system, including degree of depth reactor (1), it is characterised in that: described degree of depth reactance
Device (1) includes that measurement and control unit (6), Rogowski coil (2) and controller (5), described Rogowski coil (2) and controller (5) are respectively mounted
On bus (4), being provided with high-speed figure potentiometer in described Rogowski coil (2), described controller is provided with speed-sensitive switch in (5)
(3), the signal output part of described high-speed figure potentiometer is connected with the signal input part of described speed-sensitive switch (3), described bus
(4) voltage output end is connected with the voltage input end of described measurement and control unit (6), the signal output part of described measurement and control unit (6)
Being connected with the signal input part of described speed-sensitive switch (3) and backstage, described bus (4) is near one end of Rogowski coil (2) and weight
Load (9) parallel connection and be followed by transformator (7), near a terminating load (8) of speed-sensitive switch (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754153.4A CN106208008A (en) | 2016-08-28 | 2016-08-28 | A kind of important load bus residual voltage keeps system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754153.4A CN106208008A (en) | 2016-08-28 | 2016-08-28 | A kind of important load bus residual voltage keeps system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106208008A true CN106208008A (en) | 2016-12-07 |
Family
ID=57526566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610754153.4A Pending CN106208008A (en) | 2016-08-28 | 2016-08-28 | A kind of important load bus residual voltage keeps system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106208008A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202872353U (en) * | 2012-10-16 | 2013-04-10 | 安徽中瑞电气技术有限公司 | Zero-loss deep current-limiting device |
| CN104821563A (en) * | 2015-05-25 | 2015-08-05 | 舒尔环保科技（合肥）有限公司 | Zero-loss depth current-limiting protection device |
| US20150318688A1 (en) * | 2013-01-09 | 2015-11-05 | Shaogui AL | Current limiting device, current limiter and current limiting system for power grid |
| CN105098744A (en) * | 2014-11-18 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Bus residual voltage maintenance device |
-
2016
- 2016-08-28 CN CN201610754153.4A patent/CN106208008A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202872353U (en) * | 2012-10-16 | 2013-04-10 | 安徽中瑞电气技术有限公司 | Zero-loss deep current-limiting device |
| US20150318688A1 (en) * | 2013-01-09 | 2015-11-05 | Shaogui AL | Current limiting device, current limiter and current limiting system for power grid |
| CN105098744A (en) * | 2014-11-18 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Bus residual voltage maintenance device |
| CN104821563A (en) * | 2015-05-25 | 2015-08-05 | 舒尔环保科技（合肥）有限公司 | Zero-loss depth current-limiting protection device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |
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| WD01 | Invention patent application deemed withdrawn after publication |